Our Services

At Porter Engineering, we deliver cost-efficient, long-lasting solutions in civil and structural engineering. Whether we’re designing a new bridge, inspecting critical infrastructure, calculating load capacities, or creating custom residential plans, our focus is on safety, durability, and value. We combine modern design practices with proven techniques to minimize maintenance costs, extend the life of structures, and provide clients with reliable results from concept to completion.
View of a large cable-stayed bridge with two tall support towers and multiple cables extending from them, taken from below at an angle.

bridge design

Our bridge designs range from small timber pedestrian crossings to large multi-span highway structures, covering concrete, steel, timber, single-span, and multi-span bridge types. Every design is created to be structurally sound, cost-effective, and built for long-term performance. We use advanced design practices and efficient construction methods to reduce future maintenance needs while ensuring reliability. From concept to final build, each project reflects our technical expertise, innovative thinking, and commitment to quality. Bridge design services that we provide include the following:

  • Conceptual Design

  • Feasibility Analysis

  • Cost Analysis

  • Bridge Alternatives

  • Bridge Design Plans

  • Repair and Rehabilitation Plans

  • Architectural Design and Aesthetics

  • Hydrology, Hydraulic, and Scour Analysis

  • Specifications and Construction Guidance

Two construction workers wearing safety helmets and reflective vests walking across a bridge under construction, with a cityscape in the background.

bridge INSPECTION

We provide routine and emergency inspections to ensure the safety, compliance, and structural integrity of bridges. Our team works nationwide with the Federal Highway Administration (FHWA), state DOTs, local governments, and private bridge owners to meet the requirements of the National Bridge Inspection Standards (NBIS). From scheduled evaluations to urgent damage assessments, our inspections deliver clear reports that help clients make informed decisions about maintenance and repairs. Bridge inspection services that we provide include the following:

  • Routine Inspections

  • Damage Inspections

  • In-Depth Inspections

  • Non-Redundant Steel Tension Member (NSTM) Inspections

  • Initial Inspections

  • Maintenance Recommendations

  • Repair or Replacement Cost Analysis

  • Scour Analysis

An aerial view of a multi-lane bridge with cars and trucks traveling in both directions, casting long shadows on the road.

bridge LOAD RATINGS

We perform load ratings in accordance with the American Association of State Highway and Transportation Officials (AASHTO) Manual for Bridge Evaluation (MBE) and AASHTO Load and Resistance Factor Design (LRFD) Bridge Design Specifications. Our expertise covers steel, concrete, and timber superstructures, as well as rigid frame concrete culverts. Using specialized tools such as Bridge Rating and Analysis of Structural Systems (BRASS), Engineering Calculations (ENERCALC), and custom Mathcad worksheets, we deliver accurate calculations and detailed reports. Our analyses identify structural limitations, highlight deficiencies, and provide actionable recommendations for repairs or replacements. Bridge load rating services that we provide include the following:

  • Analysis of Bridge Deficiencies for Load Rating

  • Load Ratings per AASHTO Standards

  • Load Rating Summaries and Reports

  • Repair or Replacement Recommendations

Aerial view of a suburban neighborhood with numerous single-family homes, green lawns, and trees. The streets are curvy and well-maintained, with cars parked on the side. In the background, there is a large wooded area extending to the horizon under a cloudy sky.

residential building design

We design residential structures that meet all permitting requirements while reflecting each homeowner’s vision. Our team handles design plans, specifications, and calculations, working directly with city and county planning departments to streamline approvals. Support continues through construction as we collaborate with homeowners and contractors to keep projects on track and aligned with the original design. Residential building design services that we provide include:

  • Home Additions

  • Basements

  • Detached Garages

  • Attached Garages

  • Accessory Dwelling Units (ADUs)

  • Patio Coverings

  • Concrete Flatwork

  • Retaining Walls

  • Structural Modifications

Strong designs. Lasting results.

Let’s build your vision.